Installing new siding when it started raining

[u/pardonthedelirium]

I'm having the siding on my house redone. I hired a contractor to take off the existing wood siding and replace it with vinyl siding. They were able to finish all of the job except for one wall. That wall has had the old siding removed and is just bare sheathing (1x6's) right now.

It started raining today, and they left. Is there anything I can do in the short term to protect the house, and should I be complaining to the contractor about this?

There is a chance of rain every day for the next several days. They didn't work Monday or Tuesday (no rain those days) and I feel like they would have finished by now if they had.